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Frame by frame effect (plugin or expression?)

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Giorgio Terzo
Frame by frame effect (plugin or expression?)
on Feb 24, 2019 at 11:55:08 pm

Dear all,

I am trying to reproduce this effect ( in an animation trying to manipulate the position and skipping some frame with the following expression (thanks to Dan Ebberts!):

// Skipping frame
n = 2; // skip every nth frame

frameToSkip = 0; // 0,1,2 ...n-1
currFrame = Math.round(time/thisComp.frameDuration);
currFrame += Math.floor((currFrame - frameToSkip)/(n-1)) + 1;

//change the update of the position
rate = 5;
//add some randomenss
prob = 50;
if(random(0, 100) < prob) {
rate = rate + random(0.05);
t = framesToTime(Math.floor(timeToFrames()/rate)*rate);

The problem is that I have to apply the second expression in each moving elements and sometimes the animation is "not really controllable".
Does exist a better a method (or maybe a plugin) in order to achieve this kind of effects? A sort of master effect that can be applied for all animation?


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Dave LaRonde
Re: Frame by frame effect (plugin or expression?)
on Feb 25, 2019 at 7:29:52 pm

I suppose you COULD jump through all those coding hoops if you want, but if it was my project, I would just use a lower frame rate in the composition settings. I'll guess that 10 frames / sec would be a good starting point.

Since changing the frame rate is REALLY easy to do, you can play around with it until you get something you like.

Dave LaRonde
Promotion Producer
KGAN (CBS) & KFXA (Fox) Cedar Rapids, IA

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Mark Whitney
Re: Frame by frame effect (plugin or expression?)
on Feb 26, 2019 at 1:05:29 am

Oh wow. Ya, what Dave said. No need to "Tex Avery" something like that certainly.

Bur if you're looking for something more along stop motion lines, you might look at this though. Goes back aways but still works effectively.

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